The Claim

Frequent night shift work (defined as more than three nights per week) is associated with a 17–18% higher risk of metabolic dysfunction-associated steatotic liver disease (MASLD) compared to infrequent or no shift work, suggesting a dose-response relationship between the frequency of night shift work and the risk of liver disease.

Source: Shift work and metabolic dysfunction-associated steatotic liver disease: a systematic review of observational studies

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
52score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Correlation
1 study reviewed
In plain English

People who work nights more than three times a week are more likely to develop a type of liver fat buildup than those who rarely or never work nights — and the more nights they work, the higher the risk.

See the scientific wording

Frequent night shift work (>3 nights per week) is associated with a 17–18% higher risk of MASLD compared to infrequent or no shift work, indicating a dose-response relationship between shift frequency and liver disease risk.

What the research says

1 study
  1. Study: Shift work and metabolic dysfunction-associated steatotic liver disease: a systematic review of observational studies

    This study looked at people who work nights and found they’re more likely to have a fatty liver condition, especially if they work nights often — which matches what the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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